sortedGroupBy = (list, groupByIter, sortByIter) ->
  # Pass in an array to group by multiple object keys
  if _.isArray(groupByIter)
    groupBy = (obj) ->
      _.map groupByIter, (key, value) -> obj[key]
  else
    groupBy = groupByIter

  # Pass in an array to sort by multiple object keys
  if _.isArray(sortByIter)
    sortBy = (obj) ->
      _.map sortByIter, (key, value) -> obj[key]
  else
    sortBy = sortByIter

  groups = _.groupBy(list, groupBy)
  _.each groups, (value, key, list) ->
    list[key] = _.sortBy(value, sortBy)

  return groups